[Elecraft] Re: Anyone know this info about switching supplies?

[Tom Hammond]

Damn Wayne... you DO think of everything!

73,

Tom

At 11:09 11/06/2007, wayne burdick wrote:
>Tom Hammond wrote:
>
>>WB:
>>
>>We're discussing it here right now... what would the 'damages' be 
>>if a supply (ANY supply) could/would fail placing 24VDC at up to 
>>30A on the K3's DC line?
>>
>>I'm thinking about designing an external plug-in OVP kit.  Unless 
>>YOU want to do it.
>
>The K3 already has OVP built-in, in the form of high-current, 
>high-power zener clamp that kicks in at around 16 V. It can handle 
>hundreds of amps for long enough to blow the self-resetting polyfuse 
>(F2 on the RF board schematic). An identical device is used on the 
>KPA3, which has its own circuit breaker. So the OVP is very rugged 
>and reliable.
>
>In addition, as a backup, the K3 will turn itself off if it senses 
>an over-voltage condition.
>
>73,
>Wayne
>N6KR
>
>
>---
>
>http://www.elecraft.com